package com.lch.thread.juc;

import java.util.concurrent.ConcurrentHashMap;

/**
 * @author: liuchenhui
 * @create: 2019-05-21 22:14
 **/
public class CHMDemo {
    static ConcurrentHashMap hashMap = new ConcurrentHashMap();

    public static void main(String[] args) {

//        Collections.synchronizedMap(hashMap);
        hashMap.put("123", "123");

    }
}
